The “last untouched wilderness” in Africa has been discovered in the Bili-Uele forest in Congo, according to scientists who found a “mega-culture” of unusually large chimps — who dine on leopards and giant snails.

The area was first found in 2007, but researchers who published their findings last week in the journal Biological Conservation only recently set up two dozen cameras in the remote area.

What they found were chimps showing their young how to use tools to capture insects and extracting succulent snail meat by smashing the shells on rocks.